The term "petrol variant" refers to a type of vehicle that uses gasoline (also known as petrol) as its primary fuel source. This means that instead of using diesel or electricity, this car runs on unleaded gasoline which is mixed with air and ignited in the engine's cylinders to create power for movement. The term "petrol variant" typically refers to a specific model within a manufacturer's lineup, indicating that it has been designed specifically to use gasoline as its fuel source rather than being adaptable to run on other fuels such as diesel or electricity.